SBR1A40S3-7 Super Barrier Rectifier Diode: Ultimate Efficiency for Power Electronics

The SBR1A40S3-7 from Diodes Incorporated redefines power efficiency with its advanced Super Barrier Rectifier (SBR) technology. As part of the Discrete Semiconductor Products - Diodes - Rectifiers - Single category, this surface-mount diode delivers industry-leading performance for modern power management systems. Below, we explore its technical advantages, applications, and why engineers worldwide trust this component for critical designs.

In-Depth Technical Analysis

1. Super Barrier Rectifier (SBR) Technology

• Combines Schottky-like low forward voltage (550mV @1A) with PN junction diode reliability
• 30% lower power loss vs. standard Schottky diodes
• Patent-pending cell structure reduces reverse leakage to just 100 A @40V

2. Electrical Specifications

Parameter	Value	Advantage
Reverse Voltage (Vr)	40V	Handles industrial voltage spikes
Forward Current (Io)	1A continuous	Supports moderate power loads
Forward Voltage (Vf)	550mV @1A	Maximizes system efficiency
Reverse Leakage	100 A @40V	Reduces standby power consumption
Recovery Speed	500ns	Ideal for 100kHz+ switching

3. Thermal Performance

• -65 C to +150 C junction temperature range
• SOD-323 package enables 2.5 C/W thermal resistance
• 100% tested for thermal shock reliability

Package Details: SOD-323 (SC-76)

• Dimensions: 1.7mm x 1.25mm x 0.95mm
• Moisture Sensitivity Level (MSL): 1 (unlimited floor life)
• Pb-free and RoHS compliant
• Automated placement compatible

Key Applications

1. Switch Mode Power Supplies (SMPS)

Ideal for DC-DC converter output stages where low Vf improves efficiency by up to 3% compared to conventional diodes.

2. Battery Management Systems

Used in:
- Lithium-ion protection circuits
- Charger reverse polarity protection
- Power path OR-ing

3. Automotive Electronics

Qualified for:
- LED lighting drivers
- ECU power conditioning
- 12V/24V system protection

4. Industrial Motor Drives

Provides fast freewheeling in:
- Brushless DC motor controllers
- Stepper motor drivers
- Solenoid control circuits

Design Considerations

PCB Layout Guidelines

• Maintain <5mm trace length to switching node
• Use 1oz copper for optimal thermal performance
• Place thermal via array under pad for high-current designs

Reliability Data

• MTBF: >1 million hours @85 C
• Passes JEDEC JESD22-A104 thermal cycling tests
• 0% failure rate after 1,000 reflow cycles

Comparative Advantages

Feature	SBR1A40S3-7	Standard Schottky	PN Diode
Vf @1A	550mV	650mV	1.1V
Reverse Recovery	500ns	N/A	50ns
Leakage @40V	100 A	1mA	10 A

Purchasing Information

Available through authorized distributors:
- Tape & Reel: 3,000 units per reel
- Minimum Order Quantity: 100 units
- Lead Time: 8 weeks for full reel quantities

Conclusion

The SBR1A40S3-7 represents the optimal balance between Schottky diode efficiency and PN diode robustness. Its 40V/1A rating with industry-leading 550mV forward drop makes it the premium choice for power supply designers, automotive engineers, and industrial control system developers seeking to maximize energy efficiency without compromising reliability.

Upgrade your power designs today - contact our technical sales team for samples and detailed application notes.